Scatter plot illustrating the correlation between intracortical inhibition at rest and the level of hyperactivity/impulsivity (ADHD rating scale, FBB-HKS).

<p>Scatter plot illustrating the correlation between intracortical inhibition at rest and the level of hyperactivity/impulsivity (ADHD rating scale, FBB-HKS).</p

Demographical and clinical data for the control, H/I-low and H/I-high group and statistical comparison (***<i>p</i><.001).

<p>Demographical and clinical data for the control, H/I-low and H/I-high group and statistical comparison (***<i>p</i><.001).</p

Intracortical inhibition over the course of the nogo trials, for the go-150 ms condition and the passive control condition.

<p>For each of the three groups, mean ± SE is depicted.</p

Illustration of the go/nogo task (S1–S2 paradigm).

<p>TMS stimuli (single-pulses or double-pulses with an interstimulus interval of 3 ms) were presented 50 ms before or 150, 300 or 500 ms after the onset of the S2 stimulus.</p

Behavioural performance of the go/nogo task, subdivided in blocks with TMS and the block without TMS, and statistical comparison between the three groups.

<p>Behavioural performance of the go/nogo task, subdivided in blocks with TMS and the block without TMS, and statistical comparison between the three groups.</p

Resting motor threshold and SICI for the passive control condition and the different latencies over the course of the nogo trials (higher SICI scores indicate less inhibition) and statistical comparison between the three groups (*<i>p</i><.05, **<i>p</i><.01,***<i>p</i><.001).

<p>Resting motor threshold and SICI for the passive control condition and the different latencies over the course of the nogo trials (higher SICI scores indicate less inhibition) and statistical comparison between the three groups (*<i>p</i><.05, **<i>p</i><.01,***<i>p</i><.001).</p

Switch to register reactions.

<p>Spreading of the hand with the m. abductor digiti minimi involved. Left side: switch off. Right side: switch on.</p